They call it “dark traffic” - ads that are not seen by tech-savvy users who have excellent ad blockers.
Not surprised that its growing. The web is unusable without an ad blocker and its only getting worse, and will continue to get worse every month.
All ad networks, even the less intrusive ones, can be abused to distribute malware. In this day and age not having an ad blocker is like rawdogging internet strangers.
You could say the same thing about the webpage itself.